WO2016208273A1 - Appareil de traitement de gaz d'échappement - Google Patents

Appareil de traitement de gaz d'échappement Download PDF

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Publication number
WO2016208273A1
WO2016208273A1 PCT/JP2016/063301 JP2016063301W WO2016208273A1 WO 2016208273 A1 WO2016208273 A1 WO 2016208273A1 JP 2016063301 W JP2016063301 W JP 2016063301W WO 2016208273 A1 WO2016208273 A1 WO 2016208273A1
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WO
WIPO (PCT)
Prior art keywords
exhaust gas
group
liquid
gas treatment
flow rate
Prior art date
Application number
PCT/JP2016/063301
Other languages
English (en)
Japanese (ja)
Inventor
小松　正
邦幸 高橋
Original Assignee
富士電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 富士電機株式会社 filed Critical 富士電機株式会社
Priority to KR1020177005423A priority Critical patent/KR101769033B1/ko
Priority to EP16814044.0A priority patent/EP3187245B1/fr
Priority to CN201680002141.4A priority patent/CN106794419B/zh
Priority to DK16814044T priority patent/DK3187245T3/da
Publication of WO2016208273A1 publication Critical patent/WO2016208273A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/79—Injecting reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/10—Inorganic absorbents
    • B01D2252/103—Water
    • B01D2252/1035—Sea water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/04—Sulfur or sulfur oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications

Definitions

  • the present invention relates to an exhaust gas treatment apparatus.
  • Sulfurous acid gas (SO 2 ) which is one of the harmful components of the exhaust gas, is primarily removed from the gas through a primary reaction with the absorbent from the bottom to the top of the absorption tower. Therefore, the concentration of harmful components is lower at the top than at the bottom.
  • SO 2 sulfurous acid gas
  • the absorbing liquid having a constant flow rate is injected by the nozzle having the same diameter at the bottom and the upper part of the absorption tower, an extra absorbing liquid that does not contribute to the absorption of sulfurous acid gas is injected at the upper part of the absorption tower.
  • the electric power required to move the pump that supplies the absorbing liquid increases in accordance with the flow rate of the injected absorbing liquid.
  • an exhaust gas treatment apparatus for treating exhaust gas.
  • the exhaust gas treatment apparatus may include a reaction tower, a trunk pipe, and a plurality of injection units.
  • Exhaust gas may be introduced into the reaction tower.
  • the main pipe may be provided in the height direction inside the reaction tower.
  • a liquid for treating exhaust gas may be supplied to the main pipe.
  • the plurality of ejection units may eject the liquid supplied from the trunk tube.
  • the height direction of the reaction tower may be a direction from the bottom side of the reaction tower where the exhaust gas is introduced to the upper side of the reaction tower where the exhaust gas is discharged.
  • the plurality of injection units may be provided at different positions in the height direction.
  • the flow rate of the liquid ejected from the upper side ejection unit may be smaller than the flow rate of the liquid ejected from the lower side ejection unit.
  • the flow rate of the liquid ejected by the plurality of ejecting units may decrease from the bottom side to the upper side.
  • the particle size of the liquid ejected by the upper jet unit may be smaller than the particle size of the liquid jetted by the bottom jet unit.
  • the cross-sectional area of the stem tube on the upper side may be smaller than the cross-sectional area of the stem tube on the bottom side.
  • a plurality of injection units may be divided into a plurality of groups according to the height direction.
  • the plurality of groups may include at least a bottom group on the bottom side of the reaction tower, a top group on the top side of the reaction tower, and a middle group between the bottom group and the top group.
  • the flow rate of the liquid ejected by the plurality of ejecting units may decrease from the bottom group to the upper group.
  • the area of the openings for injecting the liquid of the plurality of injection units may be reduced in order from the bottom group to the upper group.
  • the difference between the area of the injection part in the bottom group and the area of the injection part in the middle group is larger than the difference between the area of the injection part in the middle group and the area of the injection part in the upper group. Good.
  • the exhaust gas treatment device may treat the exhaust gas discharged from the power unit.
  • the control unit may select and operate the group according to the load of the power unit.
  • the control unit may always operate the injection unit of the upper group when processing the exhaust gas.
  • FIG. 1 It is a figure showing exhaust gas treatment device 100 of a 1st embodiment. It is a figure which shows sectional drawing of the horizontal direction of the waste gas processing apparatus.
  • A is a figure which shows the opening surface 44 of the nozzle 42 in the upper group 46-3.
  • B is a figure which shows the opening surface 44 of the nozzle 42 in the middle part group 46-2.
  • C is a figure which shows the opening surface 44 of the nozzle 42 in the bottom part group 46-1.
  • FIG. 1 is a view showing an exhaust gas treatment apparatus 100 according to the first embodiment.
  • the exhaust gas treatment device 100 treats exhaust gas discharged from the power unit 20 such as a ship engine. Specifically, the exhaust gas treatment apparatus 100 removes harmful substances such as sulfurous acid gas (SO 2 ) contained in the exhaust gas.
  • the exhaust gas treatment apparatus 100 of this example includes a reaction tower 10, an exhaust gas introduction pipe 22, a main pipe 30, a liquid flow rate control unit 50, and a cleaning liquid supply pump 60.
  • the exhaust gas introduction pipe 22 introduces the exhaust gas discharged from the power unit 20 into the reaction tower 10.
  • the reaction tower 10 has an opening 24 on a side surface.
  • the exhaust gas introduction pipe 22 is connected to the bottom side 14 of the reaction tower 10 through the opening 24.
  • the exhaust gas introduction pipe 22 is connected to the reaction tower 10 so that the exhaust gas to be introduced turns spirally inside the reaction tower 10.
  • exhaust gas of 7000 (m 3 / h) (0 ° C., flow rate in terms of 1 atm) is introduced from the power unit 20 to the reaction tower 10.
  • the flow rates of the liquid and the exhaust gas are both (m 3 / h).
  • the flow rate is (m 3 / h).
  • the reaction tower 10 has an internal space extending in the height direction of the reaction tower 10 on the upper side 12 where the exhaust gas is discharged from the bottom side 14 where the exhaust gas is introduced.
  • the height direction is, for example, a direction perpendicular to the ground surface or the water surface.
  • the height direction is the z direction.
  • a horizontal plane perpendicular to the z direction is defined by an xy plane composed of an x direction and a y direction perpendicular to each other.
  • One trunk pipe 30 is provided in the internal space of the reaction tower 10. Structures such as the reaction tower 10 and the trunk pipe 30 that are in contact with the liquid (cleaning liquid) are required to have durability against seawater or alkaline liquid.
  • the material of the structure in contact with the liquid is an iron material such as SS400.
  • the material of the structure in contact with the liquid may be a copper alloy such as Nevlar brass, an aluminum alloy such as aluminum brass, a nickel alloy such as cupro nickel, or stainless steel such as SUS316L.
  • SUS is an abbreviation for stainless steel in the Japanese Industrial Standards.
  • SUS316L is a stainless steel having a lower carbon content than SUS316.
  • the trunk pipe 30 has a plurality of branch pipes 40 on the outer side surface.
  • the plurality of branch pipes 40 are provided to extend from the outer side surface of the trunk pipe 30 toward the inner side surface 16 of the reaction tower 10.
  • the branch pipe 40 is extended in the xy plane.
  • Each branch pipe 40 may extend to the vicinity of the inner side surface 16 of the reaction tower 10.
  • the distance between the tip of the branch pipe 40 and the inner side surface 16 of the reaction tower 10 may be about 1 cm to several tens of cm.
  • the trunk pipe 30 has a pair of branch pipes 40 at a plurality of positions in different height directions.
  • the branch pipes 40 are provided as a pair at predetermined positions in the z direction.
  • the branch pipes 40-2A and 40-2B are a pair of branch pipes 40 at the same position in the z direction.
  • a pair of branch pipes 40-3A and 40-3B is provided at a position higher in the z direction than the branch pipes 40-2A and 40-2B.
  • the branch pipe 40-3A is not shown.
  • the plurality of pairs of branch pipes 40-nA and 40-nB are arranged at 90 degrees apart from each other about the trunk pipe 30 at different height positions.
  • n is an arbitrary natural number of 2 or more.
  • the plurality of pairs of branch pipes 40 may be disposed at different height positions with an angular shift smaller than 90 degrees with the trunk pipe 30 as an axis.
  • the angle less than 90 degrees may be any angle in the range of 60 degrees to 20 degrees. By setting the angle smaller than 90 degrees, the absorbing liquid can be injected more densely in the reaction tower 10.
  • the plurality of pairs of branch pipes 40 may be disposed at different height positions with an angular deviation larger than 90 degrees with the trunk pipe 30 as an axis.
  • the angle greater than 90 degrees may be any angle in the range of 90 degrees to 120 degrees.
  • the branch pipe 40 has a nozzle 42 as an injection unit that injects the liquid supplied from the trunk pipe 30.
  • the branch pipe 40-8A has one nozzle 42-8A
  • the branch pipe 40-8B has one nozzle 42-8B.
  • the nozzle 42 is provided on the inner side surface 16 side which is an end portion of the branch pipe 40 in the extending direction. In the height direction, the plurality of nozzles 42 are provided at different positions. For example, in response to the branch pipes 40-1A to 40-12A being provided at different height positions, the nozzles 42-1A to 42-12A are also provided at different height positions.
  • the nozzle 42 ejects cleaning liquid from the opening surface.
  • the nozzle 42 in this example is a spray nozzle.
  • the nozzle 42 may spray the cleaning liquid in an empty cone shape.
  • the opening surface of the nozzle 42 is schematically indicated by x.
  • the nozzles 42 are provided in opposite directions.
  • the plurality of branch pipes 40 and the plurality of nozzles 42 are divided into a plurality of groups 46 according to the height direction.
  • the plurality of groups 46 includes a bottom group 46-1 on the bottom side 14, a top group 46-3 on the top side 12, and a middle group 46 between the bottom group 46-1 and the top group 46-3.
  • the trunk tube 30 of this example has a length in the z direction of 3 m, and the bottom group 46-1, the middle group 46-2, and the upper group 46-3 have a length in the z direction of 1 m, respectively.
  • the bottom group 46-1 includes nozzles 42-1A and 42-1B to nozzles 44-2A and 42-4B.
  • Middle group 46-2 includes nozzles 42-5A and 42-5B to nozzles 42-8A and 42-8B.
  • Upper group 46-3 also includes nozzles 42-12A and 42-12B through nozzles 42-9A and 42-9B.
  • each group 46 is provided with four pairs of branch pipes 40. However, in other examples, the number of branch pipes 40 in each group 46 may be smaller or larger than four pairs.
  • the reaction between sulfurous acid gas (SO 2 ) and water containing an alkali component is a primary reaction.
  • the reaction between sulfurous acid gas and sodium hydroxide can be represented by the following chemical formula 1.
  • the water containing the alkali component may be water to which at least one of sodium hydroxide (NaOH) and sodium hydrogen carbonate (Na 2 CO 3 ) is added.
  • NaOH sodium hydroxide
  • Na 2 CO 3 sodium hydrogen carbonate
  • the sulfurous acid gas becomes sulfite ions (HSO 3 ⁇ ).
  • the sulfite ions are contained in the cleaning liquid and fall to the bottom side 14 of the reaction tower 10. Then, sulfite ions pass through the drain pipe 18 as drainage and are discharged from the reaction tower 10 to the outside.
  • the wastewater may be discharged to the outside of the exhaust gas treatment apparatus 100 after pH adjustment, or may be reused as a cleaning liquid without being discharged to the outside.
  • the flow rate of the cleaning liquid ejected from the nozzle 42 on the upper side 12 is made smaller than the flow rate of the liquid ejected from the nozzle 42 on the bottom side 14. That is, the flow rate of the cleaning liquid ejected by the nozzle 42 is decreased in the order of the bottom group 46-3, the middle group 46-2, and the upper group 46-1.
  • the flow rate of the cleaning liquid in the nozzle 42 of the bottom group 46-1 is 72 (m 3 / h).
  • the flow rate of the cleaning liquid in the nozzle 42 of the middle group 46-2 is 16 (m 3 / h).
  • the flow rate of the cleaning liquid in the nozzle 42 of the upper group 46-3 is 8 (m 3 / h).
  • the liquid flow rate in the bottom group 46-1, the middle group 46-2, and the upper group 46-3 may be approximately 9: 2: 1. This can be realized by reducing the opening of the nozzle 42, which is a jet of the cleaning liquid, in the order of the bottom group 46-1, the middle group 46-2, and the upper group 46-3.
  • the area of the openings of the nozzles 42 is the same, and the number of nozzles 42 may be reduced in the order of the bottom group 46-1, the middle group 46-2, and the upper group 46-3. That is, it is only necessary that the flow rate of the liquid ejected in order from the bottom side 14 to the top side 12 can be reduced. Further, the area of the opening of the nozzle 42 may be reduced in the order of the bottom group 46-1, the middle group 46-2, and the upper group 46-3, and the area of the opening of the nozzle 42 is reduced and the number of nozzles 42 is reduced. May be.
  • Exhaust gas treatment apparatus 100 of the present example must inject excess washing water that does not contribute to absorption of sulfurous acid gas, compared to the case where the absorption liquid of the same flow rate is injected at the bottom side 14 and the upper side 12 of the absorption tower. can do. Accordingly, it is possible to suppress the electric power necessary to move the cleaning liquid supply pump 60 by the amount that does not inject the excess absorbing liquid. In addition, since the exhaust gas treatment apparatus 100 of this example increases the flow rate of the cleaning liquid on the bottom side 14 of the reaction tower 10 as compared with the upper side 12, the shortage of cleaning liquid with respect to sulfurous acid gas can be eliminated on the bottom side 14. .
  • a valve 32 is provided between the trunk tube 30 and the cleaning liquid supply pump 60.
  • the liquid flow rate control unit 50 controls the flow rate of the cleaning liquid supplied to the trunk tube 30 by controlling opening and closing of the valve 32.
  • the valve 32 in this example is an electric motor valve, but may be an electromagnetic valve. In other examples, the liquid flow rate controller 50 may not be provided. In this case, the valve 32 may be a ball valve or a gate valve that can be manually opened and closed.
  • the liquid flow rate controller 50 opens and closes the valve 32 to control the flow rate of the cleaning liquid ejected from the nozzle 42 for each of the divided groups 46 of the bottom group 46-1, the middle group 46-2, and the upper group 46-3. Can be controlled.
  • FIG. 2 is a cross-sectional view of the exhaust gas treatment apparatus 100 in the horizontal direction.
  • the opening surface 44-12A of the nozzle 42-12A faces ( ⁇ x direction)
  • the opening surface 44-11A of the nozzle 42-11A faces the y direction
  • the opening surface 44-12B of the nozzle 42-12B faces the x direction.
  • the opening surface 44-11B of the nozzle 42-11B is provided facing (-y direction).
  • Each nozzle 42 in this example ejects the cleaning liquid from the opening surface 44 in the form of an empty cone.
  • 3A is a view showing the opening surface 44 of the nozzle 42 in the upper group 46-3.
  • B is a figure which shows the opening surface 44 of the nozzle 42 in the middle part group 46-2.
  • C is a figure which shows the opening surface 44 of the nozzle 42 in the bottom part group 46-1.
  • the nozzle 42 ejects cleaning liquid from an opening 48 provided in the opening surface 44.
  • the area of the opening 48 in the nozzle 42 on the upper side 12 is smaller than the area of the opening 48 in the nozzle 42 on the bottom side 14.
  • the opening 48 of the nozzle 42 in this example is smaller in the order of the bottom group 46-1, the middle group 46-2, and the upper group 46-3. Specifically, assuming that the area of the opening 48 of the bottom group 46-1 is 1, the area of the opening 48 of the middle group 46-2 is halved and the area of the opening 48 of the upper group 46-3 is 1/6. And The smaller the area of the opening 48, the smaller the particle size of the cleaning liquid. Further, in this example, the difference between the area of the opening 48 of the nozzle 42 in the bottom group 46-1 and the area of the opening 48 of the nozzle 42 in the middle group 46-2 is the difference between the area of the opening 48 of the nozzle 42 in the middle group 46-2. It is assumed that the difference between the area and the area of the opening 48 of the nozzle 42 in the upper group 46-3 is larger.
  • FIG. 4 is a schematic diagram for comparing the particle sizes of the cleaning liquids on the bottom side 14 and the top side 12.
  • FIG. 4 is a schematic drawing for explaining the difference in particle diameter, and does not define a strict scale. However, the bottom side 14 and the top side 12 are illustrated on the same scale.
  • the cleaning liquid particles are indicated by circles, and the sulfurous acid gas is indicated by hatching.
  • Sulfurous acid gas in the exhaust gas is gradually removed from the bottom side 14 to the top side 12. Therefore, the concentration of sulfurous acid gas is lower on the upper side 12 than on the bottom side 14.
  • the particle size of the cleaning liquid ejected by the nozzle 42 on the upper side 12 is smaller than the particle size of the cleaning liquid ejected by the nozzle 42 on the bottom side 14. The smaller the particle size of the sprayed cleaning liquid, the larger the contact area with the sulfurous acid gas per mass of cleaning liquid. Therefore, even if the flow rate of the cleaning liquid is small, by reducing the particle size of the cleaning liquid toward the upper side 12, the sulfurous acid gas on the upper side 12 whose concentration has been reduced can be effectively removed.
  • the particle size of the cleaning liquid ejected by the nozzle 42 on the bottom side 14 is larger than the particle size of the cleaning liquid ejected by the nozzle 42 on the upper side 12.
  • the larger the particle size of the sprayed cleaning liquid the more cleaning liquid per particle contains more alkali components, so that the reaction of Formula 1 can be further promoted, and the amount of sulfurous acid gas absorbed increases. Therefore, by increasing the particle size of the cleaning liquid on the bottom side 14, the sulfurous acid gas on the bottom side 14 having a higher concentration can be effectively removed.
  • FIG. 5 is a diagram showing the relationship between the concentration of sulfurous acid gas and the flow rate of seawater in the height direction of the reaction tower 10.
  • seawater was used as the cleaning liquid.
  • the vertical axis on the left is the sulfurous acid gas concentration (ppm)
  • the vertical axis on the right is the flow rate of seawater in the reaction tower 10 (m 3 / h).
  • the horizontal axis is the height (m) of the reaction tower 10.
  • the solid line indicates the sulfurous acid gas concentration (ppm)
  • the dotted line indicates the flow rate (m 3 / h) of seawater in the reaction tower 10.
  • the position where the height of the reaction column 10 is 0 (zero) is the position in the height direction of the branch pipe 40-1 located on the most bottom side 14.
  • the bottom group 46-1 is provided at a height of 0.0 to 1.0 (m) of the reaction tower 10.
  • the middle group 46-2 is provided at a height of 1.0 to 2.0 (m) of the reaction tower 10.
  • the upper group 46-3 is provided at a height of 2.0 to 3.0 (m) of the reaction tower 10.
  • the flow rate of the cleaning liquid ejected by the nozzle 42 is 75 (m 3 / h) in the bottom group 46-1, 16 (m 3 / h) in the middle group 46-2, and 8 in the upper group 46-3. (M 3 / h).
  • the concentration of sulfurous acid gas was 830 ppm at the position where the height of the reaction tower 10 was 0.0 (m). At the position where the height of the reaction tower 10 is 1.0 (m), 2.0 (m) and 3.0 (m), the concentration of sulfurous acid gas is 130 (ppm), 12 (ppm) and 1.5 respectively. (Ppm).
  • sulfur dioxide gas could be effectively removed on the bottom side 14 and the upper side 12 by reducing the particle size of the cleaning liquid toward the upper side 12 and decreasing the flow rate of the cleaning liquid.
  • FIG. 6 is a comparative example showing the relationship between the concentration of sulfurous acid gas and the flow rate of seawater in the height direction of the reaction tower 10.
  • the vertical axis and the horizontal axis are the same as those in FIG.
  • the flow rate of the cleaning liquid is not changed in the height direction. That is, the flow rate of the seawater in the height direction was constant at 33.33 (m 3 / h) in the height direction.
  • the area of the openings 48 of all the nozzles 42 is the same so that the particle size of the cleaning liquid is constant.
  • the concentration of sulfurous acid gas is higher than that in the example of FIG. It can be said that supply is insufficient.
  • the concentration of sulfurous acid gas is 14 (ppm).
  • FIG. 7 is a view showing the exhaust gas treatment device 110 of the second embodiment.
  • a stem tube 30-1 on the bottom side 14 instead of the stem tube 30 of the first embodiment, a stem tube 30-1 on the bottom side 14, a stem tube 30-2 on the middle side, and a stem tube 30-3 on the upper side 12 are provided.
  • Valves 32-1, 32-2, and 32-3 are provided on the trunk tube 30-1, the middle tube 30-2, and the upper tube 12-3 on the bottom side 14, respectively.
  • the cross-sectional area of the trunk tube 30-3 on the upper side 12 is smaller than the cross-sectional area of the trunk tube 30-1 on the bottom side 14.
  • the cross-sectional area of the trunk tube 30-3 on the upper side 12 is smaller than the cross-sectional area of the trunk tube 30-2 on the middle side
  • the cross-sectional area of the trunk tube 30-2 on the middle side is the trunk tube 30- on the bottom side 14 1 is smaller than the cross-sectional area.
  • the cross-sectional area of the stem tube 30 means a cross-sectional area in the radial direction (xy plane) of the stem tube 30 extending in the direction (z direction) from the bottom side 14 to the upper side 12.
  • the flow rate of the liquid ejected by the nozzle 42 as the ejection unit can be decreased in the order of the bottom group 46-1 to the upper group 46-3.
  • the area of the opening 48 of the nozzle 42 may be decreased in the order of the bottom group 46-1 to the upper group 46-3.
  • the liquid flow rate control unit 50 of this example can control the flow rate of the cleaning liquid ejected from the nozzle 42 for each group 46.
  • the liquid flow rate control unit 50 of this example receives the load information from the power unit 20, selects the group 46 according to the load of the power unit 20, and operates the nozzles 42 of each group 46. That is, the liquid flow rate control unit 50 of this example may control each valve 32 independently according to the magnitude of the exhaust gas flow rate.
  • This example is different from the second embodiment in that it has a plurality of valves 32 and controls the plurality of valves 32 independently. Other points may be the same as in the first embodiment.
  • the liquid flow rate control unit 50 of this example may operate the nozzles 42 of the bottom group 46-1, the middle group 46-2, and the upper group 46-3 according to the magnitude of the exhaust gas flow rate. ) The nozzles 42 of the bottom group 46-1 and the upper group 46-3 may be operated together, and (c) the nozzles 42 of the middle group 46-2 and the upper group 46-3 may be operated together.
  • the cleaning liquid sprayed from the upper group 46-3 may compensate for the treatment of sulfurous acid gas that could not be treated in at least one of the bottom group 46-1 and the middle group 46-2.
  • the liquid flow rate control unit 50 may always operate the nozzles 42 of the upper group 46-3 when processing the exhaust gas.
  • the liquid flow rate control unit 50 may control the flow rate of each trunk pipe 30 in the range of 0%, 50%, and 100% by controlling the opening and closing of the valve 32.
  • the flow rate of 0% means the flow rate when the valve 32 is completely closed
  • the flow rate of 100% means the flow rate when the valve 32 is fully open.
  • the flow rate rating of the trunk pipe 30 in the bottom group 46-1, the middle group 46-2, and the upper group 46-3 may be 9: 2: 1.
  • the flow rate of each trunk pipe 30 may be controlled within an arbitrary numerical range.
  • the flow volume of each nozzle 42 can be controlled more flexibly.
  • the flow rate ratio of each trunk pipe 30 may be controlled by an arbitrary numerical value.
  • FIG. 8 is a diagram showing the nozzles 42 of the upper group 46-3 in the third embodiment.
  • the main direction 70 of the nozzles 42 of the upper group 46-3 is inclined to the bottom side 14 of the reaction tower 10.
  • the main direction 70 in this example is a straight line that passes through the apex of the cone in the cleaning liquid sprayed in an empty cone and is parallel to the height of the cone.
  • the main direction 70 may be a bisector of an angle formed by two side edges and the apex. Note that the description of the main direction 70 in the nozzles 42-12 and 42-10 is omitted in consideration of the visibility of the drawings.
  • the main direction 70 of the nozzles 42-12 and 42-10 also faces the bottom side 14.
  • the main direction 70 of the nozzles 42 of the middle group 46-2 and the bottom group 46-1 is not inclined to the bottom side 14 of the reaction column 10, but is parallel to the xy plane.
  • the main direction 70 is directed directly downward. Since the swirling flow of the exhaust gas mainly flows in a position closer to the inner side surface 16 of the reaction tower 10 than the main tube 30, it is difficult for the cleaning liquid and the swirling flow of the exhaust gas to come into gas-liquid contact when the main direction 70 is directly below. There is a possibility. Therefore, the main direction 70 in this example may be inclined by an angle smaller than 90 degrees, assuming that the inclination angle is 0 degree when the nozzle 42 is not inclined toward the bottom side 14.
  • the inclination angle of the main direction 70 may be determined according to the performance of the exhaust gas treatment apparatuses 100 and 110.
  • the inclination angle of the main direction 70 may be inclined to the bottom side 14 by several degrees to several tens of degrees, for example, may be inclined to the bottom side 14 by 10 degrees.
  • the particles of the cleaning liquid sprayed from the nozzle 42 of the upper group 46-3 have a smaller particle size than the middle group 46-2 and the bottom group 46-1, and thus the weight of the particles is light. Therefore, the particles of the cleaning liquid ejected from the nozzles of the upper group 46-3 may be discharged from the upper side 12 of the reaction tower 10 to the outside of the reaction tower 10 on the swirling flow of the exhaust gas. Since the cleaning liquid is in gas-liquid contact with the exhaust gas containing SO 2 or the like inside the reaction tower 10, it is desirable that the cleaning liquid is not discharged to the outside of the reaction tower 10.
  • the main direction 70 of the nozzle 42 in the upper group 46-3 is inclined toward the bottom side 14, it is possible to reduce the discharge of the cleaning liquid having a relatively fine particle size to the outside of the reaction tower 10. Can do.
  • all the nozzles 42 in the upper group 46-3 are preferably inclined to the bottom side 14, but the three-pair nozzles 42 (42-12, 42-11 and 42-11) closer to the upper side 12 in the upper group 46-3. 42-10) may be inclined to the bottom side 14; Alternatively, two pairs of nozzles 42 (42-12 and 42-11) closer to the upper side 12 in the upper group 46-3 may be inclined to the bottom side 14, and the uppermost side in the upper group 46-3.
  • the twelve pairs of nozzles 42-12 may be inclined toward the bottom side 14.
  • this embodiment may be applied to the first embodiment or the second embodiment.

Abstract

La présente invention réduit la quantité de liquide absorbant en excès ne contribuant pas à l'absorption d'un gaz d'acide sulfureux dans la partie supérieure d'une colonne de réaction, et surmonte tout déficit de liquide absorbant dans la partie inférieure de la tour de réaction. L'invention concerne un appareil de traitement de gaz d'échappement destiné au traitement d'un gaz d'échappement, l'appareil de traitement de gaz d'échappement comportant une colonne de réaction dans laquelle est introduit un gaz d'échappement, un tuyau de tige à travers lequel un liquide destiné au traitement du gaz d'échappement est fourni, et une pluralité de parties d'injection pour injecter le liquide fourni depuis le tuyau de tige ; la pluralité de parties d'injection étant fournie à des positions différentes le long de la direction en hauteur de la tour de réaction depuis le côté partie inférieure au niveau duquel le gaz d'échappement est introduit jusqu'au côté partie supérieure au niveau duquel le gaz d'échappement est évacué, et le débit du liquide injecté des parties d'injection côté partie supérieure étant inférieur au débit du liquide injecté à partir des parties d'injection côté partie inférieure.
PCT/JP2016/063301 2015-06-26 2016-04-27 Appareil de traitement de gaz d'échappement WO2016208273A1 (fr)

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KR1020177005423A KR101769033B1 (ko) 2015-06-26 2016-04-27 배기가스 처리장치
EP16814044.0A EP3187245B1 (fr) 2015-06-26 2016-04-27 Appareil de traitement de gaz d'échappement
CN201680002141.4A CN106794419B (zh) 2015-06-26 2016-04-27 排气处理装置
DK16814044T DK3187245T3 (da) 2015-06-26 2016-04-27 Udstødningsgasbehandlingsapparatur

Applications Claiming Priority (2)

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JP2015-128866 2015-06-26
JP2015128866A JP5999226B1 (ja) 2015-06-26 2015-06-26 排ガス処理装置

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JP (1) JP5999226B1 (fr)
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CN (1) CN106794419B (fr)
DK (1) DK3187245T3 (fr)
WO (1) WO2016208273A1 (fr)

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JP2019076799A (ja) * 2016-03-16 2019-05-23 富士電機株式会社 排ガス処理装置
KR102126830B1 (ko) * 2017-12-22 2020-06-25 한국조선해양 주식회사 선박 배기가스 처리장치
PL424328A1 (pl) * 2018-01-22 2019-07-29 Stanisław Korulczyk Technologia oczyszczania na mokro dymu odprowadzanego kominem
KR102080570B1 (ko) * 2018-01-25 2020-02-24 두산중공업 주식회사 습식배연 탈황장치
US11110391B2 (en) 2018-01-25 2021-09-07 Doosan Heavy Industries & Construction Co., Ltd. System for simultaneously removing nitrogen oxides (NOx) and sulfur oxides (SOx) from exhaust gas
WO2020131309A1 (fr) * 2018-12-20 2020-06-25 Entegris, Inc. Système actif de filtration par épuration par voie humide
JP6747552B1 (ja) * 2019-06-28 2020-08-26 富士電機株式会社 排ガス処理装置およびスクラバ用ノズル
JP7346959B2 (ja) * 2019-07-16 2023-09-20 富士電機株式会社 排ガス処理装置および排ガス処理システム
KR20220002566A (ko) * 2019-12-04 2022-01-06 후지 덴키 가부시키가이샤 배기 가스 처리 장치
EP3978137A4 (fr) * 2020-01-21 2022-10-19 Fuji Electric Co., Ltd. Dispositif de traitement de gaz d'échappement
KR20220101728A (ko) * 2020-07-21 2022-07-19 후지 덴키 가부시키가이샤 배기가스 처리 장치
JP2022059518A (ja) * 2020-10-01 2022-04-13 富士電機株式会社 排ガス処理装置
CN114411204B (zh) * 2022-01-19 2023-12-29 国家电投集团内蒙古白音华煤电有限公司铝电分公司 一种电解铝用电解槽及使用该电解槽的电解工艺

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CN106794419A (zh) 2017-05-31
KR20170033432A (ko) 2017-03-24
EP3187245B1 (fr) 2019-09-18
KR101769033B1 (ko) 2017-08-17
DK3187245T3 (da) 2019-12-09
JP2017012951A (ja) 2017-01-19
CN106794419B (zh) 2020-03-31
JP5999226B1 (ja) 2016-09-28
EP3187245A1 (fr) 2017-07-05
EP3187245A4 (fr) 2018-05-16

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